Improvement in step for vertical spindle



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N. PETERS, PHOTO-UTHOGRAFHER dimitri tant @strut chimica BEN E. DUNKLEE, OF CONCORD, NEW HAMPSHIRE, ASSIGNOR TO A.

GEAR, OF NEW HAVEN, CONNECTICUT.v

Letters Patent No. 96,407, dated November 2, 1869.

IMPROVEMENT IN STEP FOR VERTICAL SPINDLE.

The Schedule referred to in these Lettera Patent and making part of the same.

To all whom it may concern Be it known that I, BEN F. DUNKLEE, of Concord, in the county of Merrimack, and State of New Hampshire, have invented a new Improvement in Step for Vertical Spindle and I do hereby declare the following, when taken in connection with the accompanying drawings, and the letters of reference marked thereon, to be a full, clear, and exact description ofthe same7 which said drawings constitute part of this specification, and represent in- Figure 1, a side View, and in Figure 2, a vertical central section.

This invention relatesto au improvement in the step or bearing for rapidly-revolving vertical spindles;

the object being to construct a bearing which shall be self-lubricating; to this end,

The invention consists in setting the step into a socket, the said step being perforated through its lower end, and opening-into a chamber beneath, and the said chamber beneath communicating with the chamber at its side; the outside chamber extending up. above the top of the step, with the communication from the said outside chamber, to the step over its upper edge, so that the outside chamber, being lled with oil, supplies the inner chamber, and as the spindle setting in they step revolves, thek oil will pass up through the perforations in the step, and'be drawn up by the centrifugal force of the step, and pass out again into the outer chamber, and so continue keeping the step constantly lubricated with fresh material.

Inorder to the 'clear understanding of my invention, I will fully describe the same as illustratedin the accompanying drawings.

A is a socket arranged to receive and hold the step B, and so as to form a chamber C beneath the said step, and an opening, a, is formed through the step into the chamber G beneath.

Upon the side of the socket A is arranged a ,vertin cal chamber, I), extendingup above the top ofthe step, and communicating with the chamber C through van opening, d, and also with the step over its top D until it is lled to the line f, the spindle rapidly re- 1` volving creates-a centrifugal force within the step, which draws the oil through the opening c from the chamber beneath, and causes it to workup, and flow over the top of the step, through the opening c, back into Athe chamber D.

In order to insure a free passage through 'the step, I form one or more slight vertical grooves in the step, as seen in figs. 2 and 3.

` .For convenience of' cleaning from any sediment which may have found its way into the chamber, I tix a plug, F, at the bottom, which, being taken out, all the sediment may be removed, and to -clear out the passage d, I insert a screw or plug, h, which, being removed, communication is had to the said passage d.

I. am aware ofthe patent of Frank Douglass, June 9, 1868, and do not wish to be understood as claiminganything contained therein. f

Having fully described my invention, l IVhat I claim as new and useful, and desire lto secure by Letters Patent, is-

1. The combination of the two chambers D and C, constructed together in one and the same piece,'with the step B, arranged in one of the said chambers, and

with thev passages a c il, all operating as and for the Witnesses: CEAS. O. LUND,

A. S. GEAR; 

